[Pearls Before Swine]

I believe you.

I googled “submarine cruising depth”, and can see that the top, flattish part of the knee indicated on the second, gray graph, can be above or below that.

Again, the Chinese know this, too, so they’re just screwing with us. It’s not like they just grabbed the secrets to missile guidance so gaily handed to them by Bill Clinton in return for election cash back in 1996.

[central_va]

The physics of sonar are not classified.